CN115988640A - Method, system and equipment for calculating distance of user terminal based on TA value - Google Patents

Method, system and equipment for calculating distance of user terminal based on TA value Download PDF

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Publication number
CN115988640A
CN115988640A CN202310261436.5A CN202310261436A CN115988640A CN 115988640 A CN115988640 A CN 115988640A CN 202310261436 A CN202310261436 A CN 202310261436A CN 115988640 A CN115988640 A CN 115988640A
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distance
signal
calculating
user terminal
target
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CN115988640B (en
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张红飞
贾兴申
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Shenzhen Brocade Information Technology Co ltd
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Shenzhen Zht Communication Technology Co ltd
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Abstract

The disclosure relates to a method, a system and a device for calculating the distance of a user terminal based on a TA value, wherein the method comprises the following steps: estimating the distance between the target user terminal and the base station according to the TA value, receiving the target signal, and sampling the frequency
Figure ZY_2
Performing analog-to-digital conversion on a target signal to generate a local time domain DMRS signal
Figure ZY_6
To the target signalFiltering processing, namely extracting the uplink time domain DMRS signal of the target signal
Figure ZY_9
Separately for local time domain DMRS signals
Figure ZY_3
And uplink time domain DMRS signals
Figure ZY_5
Calculating correlation values in the window length range and combining to obtain correlation value combination result
Figure ZY_8
Combining the results at the correlation values
Figure ZY_11
Searching the position corresponding to the maximum value
Figure ZY_1
And calculating to obtain the uplink timing deviation as
Figure ZY_4
A sampling point for calculating the distance deviation
Figure ZY_7
And a precise distance
Figure ZY_10
. Systems and devices are used to perform the above-described methods. The method and the device can greatly improve the distance calculation precision of the user terminal, further improve the positioning precision and better meet the requirement of high-precision positioning.

Description

TA value-based user terminal distance calculation method, system and equipment
Technical Field
The present disclosure relates to the field of communications systems, and in particular, to a method, system, and device for calculating a distance between a user equipment and a TA value.
Background
In a communication system, it is necessary to provide a terminal location function to a user. In a currently common communication system, such as a 4G LTE system, a positioning principle is to estimate a distance between a user terminal and a base station based on a TA (Timing Advance) value, and an incident angle of a signal sent by the user terminal can be measured by using a phased array antenna, so as to obtain a polar coordinate system using the base station as an origin, and further obtain a location and a distance of the user terminal.
The TA value is generally used for uplink transmission of the ue, and in order to enable an uplink data packet of the ue to reach the base station at an expected time, a radio frequency transmission delay caused by a distance is estimated, and the data packet is sent out at a corresponding time in advance. The method aims to eliminate different transmission time delays among different user terminals, align the time when uplink signals of different user terminals reach a base station, ensure uplink orthogonality and reduce interference in a cell.
The timing of the uplink and downlink subframes at the base station side is the same, and the TA is essentially a negative offset between the starting time of receiving the downlink subframe and the time of transmitting the uplink subframe, and is essentially the sum of uplink and downlink transmission delays, which is characterized by 2 times of the distance between the user terminal and the antenna port of the base station.
Since the granularity of the uplink synchronization TA adjustment is 1ta = 1xts, the granularity of using TA to estimate the distance between the mobile phone and the base station is as follows:
Figure SMS_1
。
from the above results, in the LTE system, the accuracy of the distance estimation using the TA value is about 78 meters, and the accuracy of the distance estimation is very low, so that the positioning error is very large, and the positioning requirement cannot be satisfied well.
Disclosure of Invention
In order to solve the problems in the prior art, the present disclosure aims to provide a method, a system and a device for calculating a distance between a ue and a ue based on a TA value. The method and the device can greatly improve the distance calculation precision of the user terminal, further improve the positioning precision and better meet the requirement of high-precision positioning.
The method for calculating the distance of the user terminal based on the TA value comprises the following steps:
s01, estimating the distance between the target user terminal and the base station according to the uplink timing advance TA value of the target user terminal, and recording as the estimated distance
Figure SMS_2
；
S02, receiving a target signal sent by a target user terminal and sampling frequency
Figure SMS_3
Analog-to-digital converting the target signal and->
Figure SMS_4
Wherein is present>
Figure SMS_5
Represents a reference sampling frequency, <' > or>
Figure SMS_6
For characterizing the sampling frequency->
Figure SMS_7
A sampling frequency multiple relative to a reference sampling frequency;
s03, generating a local time domain DMRS signal according to the PUSCH configuration parameter of the target user terminal
Figure SMS_8
And based on the sampling frequency multiple>
Figure SMS_9
Obtaining information regarding the local time-domain DMRS signal >>
Figure SMS_10
Is greater than or equal to>
Figure SMS_11
；
S04, filtering the target signal;
s05, extracting the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure SMS_12
And based on said sampling frequency multiple>
Figure SMS_13
And an upstream window length of said target signal>
Figure SMS_14
Obtaining a DMRS signal @ in relation to the uplink time domain>
Figure SMS_15
Is greater than or equal to a second dimension->
Figure SMS_16
；
S06, according to the sampling frequency multiple
Figure SMS_17
And an upstream window length of said target signal>
Figure SMS_18
Obtaining a calculation window length>
Figure SMS_19
Separately for said local time domain DMRS signal->
Figure SMS_20
And the uplink time-domain DMRS signal->
Figure SMS_21
Long/long in the calculation window>
Figure SMS_22
Internally calculating correlation values, taking the module values of the two correlation value calculation results, and combining the two correlation value calculation results to obtain a correlation value combination result which is used for combining the values>
Figure SMS_23
；
S07, merging results in the correlation value
Figure SMS_24
The position corresponding to the medium search maximum->
Figure SMS_25
Based on the position->
Figure SMS_26
Calculating to obtain an uplink timing deviation of->
Figure SMS_27
Sampling points;
s08, according to the uplink timing deviation
Figure SMS_28
Computationally obtaining information regarding said evaluated distance>
Figure SMS_29
Is greater than or equal to>
Figure SMS_30
；
S09, estimating the distance according to the distance
Figure SMS_31
And said distance deviation>
Figure SMS_32
And calculating and obtaining the accurate distance between the target user terminal and the base station>
Figure SMS_33
。
Preferably, the step S01 is specifically:
estimating the estimated distance between the target user terminal and the base station according to the following formula
Figure SMS_34
：
Figure SMS_35
。
Preferably, the step S03 specifically includes:
generating corresponding frequency domain DMRS signals according to PUSCH configuration parameters and protocols of a target user terminal, converting the obtained frequency domain DMRS signals into time domains, and obtaining the local time domain DMRS signals of 2 time slots
Figure SMS_36
The first dimension
Figure SMS_37
。
Preferably, the step S04 is specifically:
and moving the center point of the resource block occupied by the target signal to the center of zero frequency, and then filtering the target signal by taking the width of the resource block occupied by the target signal as the passband bandwidth.
Preferably, the step S05 specifically includes:
advancing the DMRS timing position of the target signal according to the frame timing determined by the TA value
Figure SMS_38
A sampling point for extracting the uplink time domain DMRS signal(s) in 2 time slots of the target signal>
Figure SMS_39
Wherein
Figure SMS_40
Said second dimension->
Figure SMS_41
。
Preferably, step S07 is specifically:
calculating the uplink timing offset according to the following formula
Figure SMS_42
：
Figure SMS_43
。
Preferably, the step S08 specifically includes:
calculating the distance deviation as follows
Figure SMS_44
：/>
Figure SMS_45
；
The step S09 is specifically:
calculating the precise distance according to the following formula
Figure SMS_46
：
Figure SMS_47
。
The disclosed user terminal distance calculation system based on TA value includes:
an estimation module, configured to estimate a distance between the target ue and the base station according to the TA value of the uplink timing advance of the target ue, which is recorded as an estimated distance
Figure SMS_48
；
An analog-to-digital conversion module for receiving a target signal sent by a target user terminal and sampling frequency
Figure SMS_49
Analog-to-digital converting the target signal and->
Figure SMS_50
In which>
Figure SMS_51
Represents a reference sampling frequency, <' > or>
Figure SMS_52
For characterizing a sampling frequency>
Figure SMS_53
A sampling frequency multiple relative to a reference sampling frequency;
a local time domain DMRS signal generation module for generating a local time domain DMRS signal according to the PUSCH configuration parameter of the target user terminal
Figure SMS_54
And based on the sampling frequency multiple>
Figure SMS_55
Obtaining information regarding the local time-domain DMRS signal >>
Figure SMS_56
Is greater than or equal to>
Figure SMS_57
；
The filtering module is used for carrying out filtering processing on the target signal;
an uplink time domain DMRS signal extraction module, configured to extract the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure SMS_58
And based on the sampling frequency multiple>
Figure SMS_59
And an upstream window length of said target signal>
Figure SMS_60
Obtaining a DMRS signal @ in relation to the uplink time domain>
Figure SMS_61
Is greater than or equal to a second dimension->
Figure SMS_62
；
A correlation value combination result calculation module for calculating the correlation value combination result according to the sampling frequency multiple
Figure SMS_63
And an upstream window length of said target signal>
Figure SMS_64
Obtain the calculation window length->
Figure SMS_65
Separately for said local time domain DMRS signal->
Figure SMS_66
And the uplink time domain DMRS signal
Figure SMS_67
Long/long in the calculation window>
Figure SMS_68
Internally calculating correlation values, taking the modulus of the two correlation value calculation results, and combining to obtain a correlation value combination result->
Figure SMS_69
；
A timing offset calculation module for combining results at the correlation values
Figure SMS_70
Position corresponding to the maximum value of the medium search
Figure SMS_71
Based on said position>
Figure SMS_72
Calculating to obtain an uplink timing offset->
Figure SMS_73
;
A distance deviation calculation module for calculating the uplink timing deviation according to the uplink timing deviation
Figure SMS_74
Calculating to obtain the estimated distance
Figure SMS_75
Is greater than or equal to>
Figure SMS_76
；
A precise distance calculation module for calculating a distance based on the estimated distance
Figure SMS_77
And said distance deviation>
Figure SMS_78
And calculating and obtaining the accurate distance between the target user terminal and the base station>
Figure SMS_79
。
A computer device of the present disclosure comprises a processor and a memory in signal connection, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program, when loaded by the processor, executes the method for calculating the distance between the user terminals based on the TA value as described above.
A computer-readable storage medium of the present disclosure has at least one instruction or at least one program stored thereon, which when loaded by a processor, performs the method for calculating a distance between a user equipment and a mobile station based on a TA value as described above.
The method, the system and the equipment for calculating the distance of the user terminal based on the TA value have the advantages that:
the distance deviation is obtained through calculation of the timing deviation pair, the estimated distance obtained by using the TA value is corrected based on the distance deviation, and then the precision of the finally obtained accurate distance can reach
Figure SMS_80
Level, specifically reachable
Figure SMS_81
The distance calculation precision of the user terminal can be greatly improved, the positioning precision is further improved, and the high-precision positioning requirement can be better met;
meanwhile, the positioning precision can be further improved by improving the sampling frequency of the target signal, for example, the sampling frequency of the target signal is improved
Figure SMS_82
Multiple times, the corresponding positioning precision can be achieved>
Figure SMS_83
The positioning device can be designed according to the positioning precision requirement, can meet the occasion of high-precision positioning requirement, and is wider in application and more flexible in use.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for calculating a distance between a ue and a ue according to a TA value according to an embodiment of the present invention;
fig. 2 is a test result diagram of positioning error and distance in a short-distance scene according to the method for calculating the distance between the user terminal and the TA value in this embodiment;
fig. 3 is a diagram of a test result of a positioning error and a distance in a distance scene in the method for calculating a distance of a ue based on a TA value according to this embodiment;
fig. 4 is a test result diagram of positioning error and distance in a long-distance scene according to the method for calculating the distance between the ue and the TA value in this embodiment;
fig. 5 is a schematic structural diagram of a computer device according to this embodiment.
Description of the reference numerals: 101-processor, 102-memory.
Detailed Description
As shown in fig. 1, a method for calculating a distance between a ue and a TA according to the present disclosure includes the following steps:
s01, estimating the distance between the target user terminal and the base station according to the uplink timing advance TA value of the target user terminal, and recording as the estimated distance
Figure SMS_84
(ii) a Specifically, by adopting a conventional TA value distance estimation method, the base station acquires the uplink timing advance TA of a target user terminal, such as a target mobile phone, and preliminarily estimates the estimated distance ≥ based on the following formula>
Figure SMS_85
：
Figure SMS_86
。
Estimating distance
Figure SMS_87
In order to estimate the obtained distance by using the conventional TA value, the error is large, and it needs to be corrected by the subsequent steps.
S02, receiving a target signal sent by a target user terminal and sampling frequency
Figure SMS_88
Analog-to-digital converting the target signal and->
Figure SMS_89
In which>
Figure SMS_90
Represents a reference sampling frequency, <' > based on>
Figure SMS_91
For characterizing a sampling frequency>
Figure SMS_92
A sampling frequency multiple relative to a reference sampling frequency;
specifically, in the actual 4G LTE system, the signal bandwidth is 20M, and the sampling frequency is 30.72MHz, so in this step, the reference sampling frequency is set as the reference sampling frequency
Figure SMS_93
Equal to 30.72MHz, there are:
Figure SMS_94
；
and is
Figure SMS_95
Typically 1 or 2 or 4.
S03, generating a local time domain DMRS (Demodulation Reference Signal) Signal according to a Physical Uplink Shared Channel (PUSCH) configuration parameter of a target user terminal
Figure SMS_96
And based on said sampling frequency multiple>
Figure SMS_97
Obtaining information regarding the local time-domain DMRS signal >>
Figure SMS_98
In a first dimension +>
Figure SMS_99
；
Specifically, a corresponding frequency domain DMRS signal is generated according to the PUSCH configuration parameters and the 3GPP36.211 protocol of the target user terminal, and the obtained frequency domain DMRS signal is converted into a time domain through conventional time-frequency domain conversion processing, so that the local time domain DMRS signal of 2 time slots is obtained
Figure SMS_100
The local time domain DMRS signal >>
Figure SMS_101
Is greater than or equal to a first dimension->
Figure SMS_102
。
In a specific embodiment, when information sent by a target terminal needs to be acquired, down-sampling processing may be performed on a target signal from a frame header position, a sampling frequency of data is restored to 30.72MHz, then data of a first subframe is extracted from a subframe header position, and then information sent by the target terminal to a base station may be acquired through PUSCH channel analysis.
S04, filtering the target signal; specifically, the center point of a Resource Block (RB) occupied by the target signal is moved to the center of zero frequency, and then the target signal is filtered by taking the width of the Resource Block occupied by the target signal as the passband bandwidth, so that only the DMRS signal is reserved in the frequency domain.
S05, extracting the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure SMS_103
And based on the sampling frequency multiple>
Figure SMS_104
And an upstream window length of said target signal>
Figure SMS_105
ObtainingWith respect to the uplink time-domain DMRS signal >>
Figure SMS_106
In a second dimension +>
Figure SMS_107
；
Specifically, the DMRS timing position of the target signal is advanced according to the frame timing determined by the TA value of the uplink timing advance
Figure SMS_108
A sampling point for extracting the uplink time domain DMRS signal(s) in 2 time slots of the target signal>
Figure SMS_109
Wherein
Figure SMS_110
，/>
Figure SMS_111
1024 may be taken.
S06, according to the sampling frequency multiple
Figure SMS_112
And an upstream window length of said target signal>
Figure SMS_113
Obtain the calculation window length->
Figure SMS_114
In particular, the calculation window length->
Figure SMS_115
。
Respectively aiming at the local time domain DMRS signals
Figure SMS_116
And the uplink time-domain DMRS signal->
Figure SMS_117
At the calculated window length
Figure SMS_118
Internally calculating the correlation values, and respectively recording the calculation results of the two correlation values as->
Figure SMS_119
And &>
Figure SMS_120
All dimensions are->
Figure SMS_121
。
And combining the two correlation value calculation results after taking the modulus value to obtain the correlation value combination result
Figure SMS_122
All dimensions are
Figure SMS_123
。
S07, combining results in the correlation value
Figure SMS_124
The position corresponding to the medium search maximum->
Figure SMS_125
Based on the position->
Figure SMS_126
The uplink positioning deviation is calculated and obtained as ^ based on the following formula>
Figure SMS_127
Sampling points:
Figure SMS_128
。
s08, according to the uplink timing deviation
Figure SMS_129
The evaluation distance is determined in relation to the evaluation distance as calculated in the following formula>
Figure SMS_130
Is greater than or equal to>
Figure SMS_131
：/>
Figure SMS_132
。
S09, estimating the distance according to the
Figure SMS_133
And the distance deviation->
Figure SMS_134
The estimated distance ≥ obtained in step S01 is determined as follows>
Figure SMS_135
Correcting, calculating to obtain the accurate distance between the target user terminal and the base station>
Figure SMS_136
：
Figure SMS_137
。
In order to verify the effectiveness of the calculation method of the embodiment, the distance errors of the target mobile phone are respectively tested in three scenes, namely a near scene, a middle scene and a far scene, the testing is carried out 10000 times in each scene, the test result graphs are respectively shown in fig. 2, fig. 3 and fig. 4, from the analysis of the test results, the calculation method of the embodiment can accurately position in the three scenes, namely the near scene, the middle scene and the far scene, the probability of the positioning error within 10 meters can reach more than 95%, and the calculation method of the embodiment has the effect of high positioning accuracy.
The distance deviation is obtained through calculation of the timing deviation pair, the estimated distance obtained by using the TA value is corrected based on the distance deviation, and then the precision of the finally obtained accurate distance can reach
Figure SMS_138
Class, specifically reachable
Figure SMS_139
The distance calculation precision of the user terminal can be greatly improved, the positioning precision is further improved, and the high-precision positioning requirement can be better met;
meanwhile, the positioning precision can be further improved by improving the sampling frequency of the target signal, for example, the sampling frequency of the target signal is improved
Figure SMS_140
Multiple times, the corresponding positioning precision can be achieved>
Figure SMS_141
The positioning device can be designed according to the positioning precision requirement, can meet the occasion of high-precision positioning requirement, and is wider in application and more flexible in use.
The embodiment further provides a TA value-based user terminal distance calculating system, including:
an estimation module, configured to estimate a distance between the target ue and the base station according to the TA value of the uplink timing advance of the target ue, which is recorded as an estimated distance
Figure SMS_142
；
An analog-to-digital conversion module for receiving a target signal transmitted by a target user terminal and sampling the signal at a sampling frequency
Figure SMS_143
Analog-to-digital converting the target signal and->
Figure SMS_144
Wherein is present>
Figure SMS_145
Represents a reference sampling frequency, <' > or>
Figure SMS_146
For characterizing the sampling frequency->
Figure SMS_147
Relative to each otherA sampling frequency multiple at a reference sampling frequency;
a local time domain DMRS signal generation module for generating a local time domain DMRS signal according to the PUSCH configuration parameter of the target user terminal
Figure SMS_148
And based on the sampling frequency multiple>
Figure SMS_149
Obtaining information regarding the local time-domain DMRS signal >>
Figure SMS_150
Is greater than or equal to>
Figure SMS_151
；
The filtering module is used for carrying out filtering processing on the target signal;
an uplink time domain DMRS signal extraction module, configured to extract the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure SMS_152
And based on the sampling frequency multiple>
Figure SMS_153
And an upstream window length of said target signal>
Figure SMS_154
Obtaining a DMRS signal @ in relation to the uplink time domain>
Figure SMS_155
Is greater than or equal to a second dimension->
Figure SMS_156
；
A correlation value combination result calculation module for calculating the correlation value combination result according to the sampling frequency multiple
Figure SMS_157
And an upstream window length of said target signal>
Figure SMS_158
Obtaining a calculation window length>
Figure SMS_159
Separately for said local time domain DMRS signal->
Figure SMS_160
And the uplink time domain DMRS signal
Figure SMS_161
Long/long in the calculation window>
Figure SMS_162
Internally calculating correlation values, taking the modulus of the two correlation value calculation results, and combining to obtain a correlation value combination result->
Figure SMS_163
；
A timing offset calculation module for combining results at the correlation values
Figure SMS_164
Position corresponding to the maximum value of the medium search
Figure SMS_165
Based on said position>
Figure SMS_166
Calculating an uplink timing skew>
Figure SMS_167
;
A distance deviation calculation module for calculating the uplink timing deviation according to the uplink timing deviation
Figure SMS_168
Calculating to obtain information about the estimated distance
Figure SMS_169
Is greater than or equal to>
Figure SMS_170
；
A precise distance calculation module for calculating a precise distance based on the estimated distance
Figure SMS_171
And the distance deviation->
Figure SMS_172
And calculating and obtaining the accurate distance between the target user terminal and the base station>
Figure SMS_173
。
The TA value-based ue distance calculating system of the present embodiment is based on the same inventive concept as the method embodiments described above, and can be understood by referring to the description of the method embodiments above, which is not repeated herein.
As shown in fig. 5, this embodiment further provides a computer device, which includes a processor 101 and a memory 102 connected by a bus signal, where the memory 102 stores at least one instruction or at least one program, and when the at least one instruction or the at least one program is loaded by the processor 101, the method for calculating the distance between the user terminals based on the TA value is performed. The memory 102 may be used to store software programs and modules, and the processor 101 executes various functional applications by running the software programs and modules stored in the memory 102. The memory 102 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, application programs required for functions, and the like; the storage data area may store data created according to use of the apparatus, and the like. Further, the memory 102 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 102 may also include a memory controller to provide the processor 101 access to the memory 102.
The method embodiments provided by the embodiments of the present disclosure may be executed in a computer terminal, a server or a similar computing device, that is, the computer device may include a computer terminal, a server or a similar computing device. The internal structure of the computer device may include, but is not limited to: a processor, a network interface, and a memory. The processor, the network interface and the memory in the computer device may be connected by a bus or other means.
The processor 101 (or CPU) is a computing core and a control core of the computer device. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI, mobile communication interface, etc.). The Memory 102 (Memory) is a Memory device in the computer device for storing programs and data. It is understood that the memory 102 may be a high-speed RAM memory device, or may be a non-volatile memory device (non-volatile memory), such as at least one magnetic disk memory device; optionally, at least one memory device located remotely from the processor 101. The memory 102 provides storage space that stores an operating system of the electronic device, which may include, but is not limited to: a Windows system (an operating system), linux (an operating system), android (Android, a mobile operating system) system, IOS (a mobile operating system) system, and the like, which are not limited by the present disclosure; also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor 101. In this embodiment, the processor 101 loads and executes one or more instructions stored in the memory 102 to implement the method for calculating the distance between the ue and the TA based on the TA value according to the above method embodiment.
The disclosed embodiments also provide a computer-readable storage medium, on which at least one instruction or at least one program is stored, and when the at least one instruction or the at least one program is loaded by the processor 101, the method for calculating the distance between the user terminals based on the TA value is performed. The computer-readable storage medium carries one or more programs which, when executed, implement the method according to an embodiment of the disclosure.
According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. Examples may include, but are not limited to: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the present disclosure, and in the absence of a contrary explanation, these directional terms are not intended to indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present disclosure.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present disclosure.

Claims (10)

1. A method for calculating the distance between user terminals based on TA value is characterized by comprising the following steps:
s01, estimating the distance between the target user terminal and the base station according to the uplink timing advance TA value of the target user terminal, and recording as the estimated distance
Figure QLYQS_1
；
S02, receiving a target signal sent by a target user terminal and sampling frequency
Figure QLYQS_2
Analog-to-digital converting the target signal and->
Figure QLYQS_3
Wherein is present>
Figure QLYQS_4
Represents a reference sampling frequency, <' > or>
Figure QLYQS_5
For characterizing a sampling frequency>
Figure QLYQS_6
A sampling frequency multiple relative to a reference sampling frequency;
s03, generating a local time domain DMRS signal according to the PUSCH configuration parameter of the target user terminal
Figure QLYQS_7
And based on the sampling frequency multiple>
Figure QLYQS_8
Obtaining information regarding the local time-domain DMRS signal >>
Figure QLYQS_9
Is greater than or equal to>
Figure QLYQS_10
；
S04, filtering the target signal;
s05, extracting the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure QLYQS_11
And based on the sampling frequency multiple>
Figure QLYQS_12
And an upstream window length of said target signal>
Figure QLYQS_13
Obtaining a DMRS signal @ in relation to the uplink time domain>
Figure QLYQS_14
Is greater than or equal to a second dimension->
Figure QLYQS_15
；
S06, according to the sampling frequency multiple
Figure QLYQS_16
And an upstream window length of said target signal>
Figure QLYQS_17
Obtaining a calculation window length>
Figure QLYQS_18
Separately for said local time domain DMRS signal->
Figure QLYQS_19
And the uplink time-domain DMRS signal->
Figure QLYQS_20
In said calculation window long>
Figure QLYQS_21
Internally calculating correlation values, taking the module values of the two correlation value calculation results, and combining the two correlation value calculation results to obtain a correlation value combination result which is used for combining the values>
Figure QLYQS_22
；
S07, combining results in the correlation value
Figure QLYQS_23
The position corresponding to the medium search maximum->
Figure QLYQS_24
Based on the position->
Figure QLYQS_25
Calculating an uplink timing offset to >>
Figure QLYQS_26
Sampling points;
s08, according to the uplink timing deviation
Figure QLYQS_27
A calculation is obtained in respect of the evaluated distance pick>
Figure QLYQS_28
Is greater than or equal to>
Figure QLYQS_29
；
S09, estimating the distance according to the
Figure QLYQS_30
And the distance deviation->
Figure QLYQS_31
Calculating to obtain the accurate distance between the target user terminal and the base station>
Figure QLYQS_32
。
2. The method for calculating the distance between the ue and the TA according to claim 1, wherein the step S01 specifically comprises:
estimating the estimated distance between the target user terminal and the base station according to the following formula
Figure QLYQS_33
：
Figure QLYQS_34
。
3. The method according to claim 2, wherein said step S03 specifically comprises:
generating corresponding frequency domain DMRS signals according to PUSCH configuration parameters and protocols of a target user terminal, converting the obtained frequency domain DMRS signals into time domains, and obtaining the local time domain DMRS signals of 2 time slots
Figure QLYQS_35
The first dimension of
Figure QLYQS_36
。
4. The method according to claim 3, wherein the step S04 specifically comprises:
and moving the center point of the resource block occupied by the target signal to the center of zero frequency, and then filtering the target signal by taking the width of the resource block occupied by the target signal as the passband bandwidth.
5. The method for calculating the distance between the ue and the TA according to claim 4, wherein the step S05 specifically comprises:
advancing the DMRS timing position of the target signal according to the frame timing determined by the TA value
Figure QLYQS_37
A sampling point for extracting the uplink time domain DMRS signal(s) in 2 time slots of the target signal>
Figure QLYQS_38
In which
Figure QLYQS_39
SaidSecond dimension +>
Figure QLYQS_40
。
6. The method according to claim 5, wherein said step S07 specifically comprises:
calculating the uplink timing offset according to the following formula
Figure QLYQS_41
：
Figure QLYQS_42
。
7. The method according to claim 6, wherein the step S08 specifically comprises:
calculating the distance deviation as follows
Figure QLYQS_43
：
Figure QLYQS_44
；
The step S09 is specifically:
calculating the precise distance according to the following formula
Figure QLYQS_45
：
Figure QLYQS_46
。
8. A system for calculating a distance between a user terminal and a TA value, comprising:
an estimation module for uplink timing advance according to a target user terminalThe front quantity TA value, the distance between the target user terminal and the base station is estimated and recorded as the estimated distance
Figure QLYQS_47
；
An analog-to-digital conversion module for receiving a target signal transmitted by a target user terminal and sampling the signal at a sampling frequency
Figure QLYQS_48
Analog-to-digital converting the target signal and->
Figure QLYQS_49
Wherein is present>
Figure QLYQS_50
Represents a reference sampling frequency, <' > or>
Figure QLYQS_51
For characterizing the sampling frequency
Figure QLYQS_52
A sampling frequency multiple relative to a reference sampling frequency;
a local time domain DMRS signal generation module for generating a local time domain DMRS signal according to the PUSCH configuration parameter of the target user terminal
Figure QLYQS_53
And based on the sampling frequency multiple>
Figure QLYQS_54
Obtaining information regarding the local time-domain DMRS signal >>
Figure QLYQS_55
In a first dimension +>
Figure QLYQS_56
；
The filtering module is used for carrying out filtering processing on the target signal;
an uplink time domain DMRS signal extraction module, configured to extract the uplink time domain DMRS signal of the target signal according to the frame timing determined by the uplink timing advance TA value
Figure QLYQS_57
And based on said sampling frequency multiple>
Figure QLYQS_58
And an upstream window length of said target signal>
Figure QLYQS_59
Obtaining a DMRS signal @ in relation to the uplink time domain>
Figure QLYQS_60
Is greater than or equal to a second dimension->
Figure QLYQS_61
；
A correlation value combination result calculation module for calculating the correlation value combination result according to the sampling frequency multiple
Figure QLYQS_62
And an upstream window length of said target signal>
Figure QLYQS_63
Obtain the calculation window length->
Figure QLYQS_64
Separately for said local time domain DMRS signal->
Figure QLYQS_65
And the uplink time-domain DMRS signal->
Figure QLYQS_66
In said calculation window long>
Figure QLYQS_67
Internally calculating correlation values, taking the module values of the two correlation value calculation results, and combining the two correlation value calculation results to obtain a correlation value combination result which is used for combining the values>
Figure QLYQS_68
；
A timing offset calculation module for combining results at the correlation values
Figure QLYQS_69
The position corresponding to the medium search maximum->
Figure QLYQS_70
Based on the position->
Figure QLYQS_71
Calculating to obtain an uplink timing offset->
Figure QLYQS_72
;
A distance deviation calculation module for calculating the uplink timing deviation according to the uplink timing deviation
Figure QLYQS_73
A calculation is obtained in respect of the evaluated distance pick>
Figure QLYQS_74
Is greater than or equal to>
Figure QLYQS_75
；
A precise distance calculation module for calculating a precise distance based on the estimated distance
Figure QLYQS_76
And said distance deviation>
Figure QLYQS_77
And calculating and obtaining the accurate distance between the target user terminal and the base station>
Figure QLYQS_78
。
9. Computer device comprising a processor and a memory in signal connection, characterized in that said memory has stored therein at least one instruction or at least one program which, when loaded by said processor, performs a method for user terminal distance calculation based on TA values according to any of claims 1-7.
10. A computer readable storage medium having at least one instruction or at least one program stored thereon, wherein the at least one instruction or the at least one program when loaded by a processor performs a method for TA value based ue distance calculation according to any of claims 1-7.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102307167A (en) * 2011-09-22 2012-01-04 京信通信系统（中国）有限公司 Method and device for adjusting uplink timing advance and base station system
US20190007254A1 (en) * 2016-01-21 2019-01-03 Huawei Technologies Co., Ltd. Method and apparatus for determining time offset
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EP3860234A1 (en) * 2018-09-28 2021-08-04 Huawei Technologies Co., Ltd. Uplink signal transmission method and device
WO2022027628A1 (en) * 2020-08-07 2022-02-10 Oppo广东移动通信有限公司 Uplink timing advance determining method and apparatus, and device and storage medium

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102307167A (en) * 2011-09-22 2012-01-04 京信通信系统（中国）有限公司 Method and device for adjusting uplink timing advance and base station system
US20190007254A1 (en) * 2016-01-21 2019-01-03 Huawei Technologies Co., Ltd. Method and apparatus for determining time offset
US20190306821A1 (en) * 2016-12-20 2019-10-03 Huawei Technologies Co., Ltd. Method and apparatus for determining clock time deviation between terminal and base station
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